android.mime.types: minor cleanup.

Extensions listed in android.mime.types can have a trailing '!'
to signify that they should override any previously encountered
mapping from the MIME type on the same line.

Multiple '!' can always be rewritten such that only a single
'!' is required; for example, the extension list

  foo! bar! baz

can equivalently be written as:

  bar! foo baz

This CL only allows '!' on the first extension listed in a line.

Additional sanity checks (for example: '!' should only occur in
android.mime.types but never in mime.types, and there shouldn't
be a need for the same MIME type to occur more than once in the
same file) are not done in this CL but left to a potential future
follow-up CL.

Test: atest CtsLibcoreTestCases:libcore.libcore.net.MimeMapTest
      (note that test covers expectations for the MIME type
      and extensions in android.mime.types touched by this CL).
Bug: 122831291

Change-Id: Ib7d783ae8bb83c306578f9ea9acadce11ec8f23b

0 files changed, 0 insertions, 0 deletions